Replace each hash value with proper settings for your Simple Mail Transfer Protocol (SMTP) server. You can take this information from your Internet Service Provider if you already don't know. You don't need to change port number 25 and authentication type if you are using standard SMTP server.

You may also change the default email message format. If you prefer to send email in HTML instead of plain text format, add the following line to config/environment.rb as well:

ActionMailer::Base.default_content_type = "text/html"

ActionMailer::Base.default_content_type could be set to "text/plain", "text/html", and "text/enriched". The default value is "text/plain".

The contact method has four parameters a recipient, subject, message and a sent_at, which defines when the e-mail is sent. The method also defines six standard parameters that are a part of every ActionMailer method:

@subject defines the e-mail subject.

@body is a Ruby hash that contains values with which you can populate the mail template. You created
three key-value pairs: title, email, and message

@recipients is a list of the people to whom the message is being sent.

@from defines who the e-mail is from.

@sent_on takes the sent_at parameter and sets the timestamp of the e-mail.

@headers is another hash that enables you to modify the e-mail headers. For example, you can set the MIME type of the e-mail if you want to send either plain text or HTML e-mail.

Creating Controller:

Now we will create a controller for this application as follows:

C:\ruby\emails> ruby script/generate controller Emailer

Now lets define a controller method sendmail in app/controllers/emailer_controller.rb which will call Model method to send actual email as follows:

To deliver e-mail using the mailer's contact method, you have to add deliver_ to the beginning of the method name. You add a return if request.xhr? so that you can escape to Rails Java Script (RJS) if the browser does not support JavaScript and then tell the method to render a text message.

You are almost done except to prepare a screen from where you will get user information to send email. So let's define one screen method index in controller and then in next section we will define all the required views:

Add following code in emailer_controller.rb file

def index
render :file => 'app\views\emailer\index.html.erb'
end

Defining Views:

Define a view in app\views\emails\index.html.erb. This will be called as the default page for the application and will allow user to enter message and send required email:

Apart from the above view, we need one more template which will be used by the Emailer's contact method while sending message. This is just text with standard Rails <%= %> placeholders scattered throughout.

So just put the following code in app/views/contact.html.erb file

Hi!
You are having one email message from <%= @email %> with a title
<%= @title %>
and following is the message:
<%= @message %>
Thanks

Rest for Testing:

Before starting your testing make sure your machine is connected to internet and your Email Server is up and running, Also your Webserver should be up and running well.

Now test your application by using http://127.0.0.1:3000/Emailer/index. This displays following screen and by using this screen now you will be able to send your message to anybody.

This will send your message and will display text message that "Message sent successfully"

Sending HTML Emails using Rails:

To send mail as HTML, make sure your view (the .erb file) generates HTML and set the content type to html in your emails/app/models/emailer.rb file as follows: